Waterproof air-trapping submersible design w/large Lexan rectangle lens. Works like inverted water glass. Black body. Bulb slide w/built-in dust & splash guard with Hi & Dry Terminals. Snaps out for serviceable no-tools required bulb replacement. Sonically sealed no gaskets to leak or inventory. Replace any standard 2'' mount. Complies with Federal legal requirements. 5-year submersible warranty.